Rhenium(I) and technetium(I) complexes of a novel pyridyltriazole-based ligand containing an arylpiperazine pharmacophore: Synthesis, crystal structures, computational studies and radiochemistry

Rhenium and technetium tricarbonyl complexes of 1,4‐Substituted pyridyl‐1,2,3‐triazole bidentate ‘click’ ligands conjugated to a targeting RGD peptide

“…The coordination sphere is completed by L 1 , which acts as a bidentate ligand. The Re‐N (pyridyl) bond distances (≈2.20 Å) are slightly longer than the Re‐N (triaozlyl) distance (≈2.139 Å) but consistent with similar structures . The bite angle for the bidentate ligand (74.43°) is similar to the angle found in the previously published structure [Re(CO) 3 L 1 Cl] (74.5°) .…”

Synthesis, Structure and DFT Study of a Rhenium(I) Pyridylpyrazole Complex as a Potential Photocatalyst for CO2 Reduction

“…In addition, the pyridine plane (N1/C4/C5/C6/C7/C8) and the pyrazole plane (N2/N3/C9/C10/C11) were nearly planar with a minor deviation angle of 3.1(3)º due to the restriction upon coordination with Re I . The bond length of Re-Cl and Re-N of the pyridine and pyrazole groups are similar to the corresponding bond lengths in related structures (Obata et al 2008;Seridi et al 2011). Figure 2 with one water molecule held by intramolecular hydrogen bond between O1W atom of water molecule with H7 atom of the pyrazole moiety FIGURE 2.…”

Computational investigations of click-derived 1,2,3-triazoles as keystone ligands for complexation with transition metals: a review

“…Moreover, the corresponding rhenium complexes were synthesized and characterized in the solid and solution states. 63,97 In another research, a family of electronically tuned facRe(CO) 3 Cl$2-(1-R-1H-1,2,3-triazol-4-yl)pyridine 6 complexes (Scheme 3) was generated using efficient click reactions.…”

“…It has been shown that the triazole ring substituent effect is not considerable on the metric properties of rhenium complexes and so it can be deduced that side-arm substitution leads to little electronic tuning of the ligand. Furthermore, in these [(4-R-1H-1,2,3-triazol-1-yl)methyl]pyridine 5 set of ligands, it was found that the N py -Re bond length value (2.198 (5) Clearly speaking, regardless of whether the triazole is coordinated to the Re center, the obtained values of the Re-N2 trz and Re-N2 trz -N4 py bond lengths and angles in the entire series of regular ve-membered rhenium click complexes 63,64,97,183,184 (Schemes 27 and 29) were very near to those of inverse sixmembered rhenium click complexes, and this feature has been also studied and conrmed in the Pd(II) complexes of these ligands.…”